Method for ascertaining the authenticity of a document and device for carrying out such a method

Abstract

A security element is applied to a document or an object in the form of a directly printed marking or in the form of a tag made of paper or another material, with or without an identifier. A user can take a picture of the marking or tag with a smartphone and then send the picture to a device including software provided with a recognition algorithm including neural networks. The device visualizes the fingerprint of the tag or marking, thus making it possible to ascertain the authenticity of the document or object. In order to establish the authenticity of the product protected by the device, the image, stored in a cloud or blockchain database, of the tag obtained after printing same or of the marking is compared with a new description.

The invention claimed is: 
     
       1. An authentication method comprising establishing a subsequent description of an authentication device comprising one or more visible elements having a random shape and/or position and comparing said description with an original description of said authentication device,
 wherein the authentication device includes a security element in the form of a tag or marking simultaneously comprising, 
 a unique identifier either for a product or for a set of products or for identifying a printing master on a plate of a static printer of any category that can print by rotation multiple products with the same identifier, and 
 intrinsic disruptors randomly arranged and with random forms, in two dimensions so as to be visible whatever an angle of picture shootings, wherein the intrinsic disruptors are colored fibers at bidimensional positions in a special paper or plastic, or the intrinsic disruptors are a non-reproducible random shape of two-dimensional stains presented by solidified and dried specific chemical varnish, and 
 positioning markers which consist of a plurality of dots with geometric specific features for localizing an area, which includes the intrinsic disruptors, to be analyzed for authentication, 
 and the method further comprises recognizing by an algorithm, from any picture shooting angle, the bidimensional printed pattern and its random components in said area including the intrinsic disruptors to be analyzed and localized thanks to said dots with geometric specific features. 
 
     
     
       2. The authentication method as claimed in  claim 1 ,
 wherein the intrinsic disruptors are the non-reproducible random shape of two-dimensional stains presented by solidified and dried specific chemical varnish; and 
 
       further comprising additional printing of the two-dimensional stains using or not using of a second machine and thus the two-dimensional stains being subjected to a random register error, the whole ensuring a recognition of the unique printing. 
     
     
       3. An authentication device for implementing the authentication method as claimed in  claim 1 , the authentication device comprising
 a camera to take one or more pictures of the security element, with or without flash, and 
 a device configured to receive the one or more pictures and comprising a recognition algorithm software that visualizes a unique fingerprint of the special paper, or plastic or varnish, allowing the authenticity of said security element to be ascertained by comparing it almost instantaneously with the original description stored in a cloud, wherein said recognition algorithm software has either a direct connection to the cloud or a blockchain, or a connection via a chat box messaging service dedicated to the cloud or blockchain; 
 wherein the at least one security element is in the form of a tag or marking and simultaneously comprises:
 a unique identifier for a product or for a set of products or for identifying printing master on a plate of a static printer of any category that can print by rotation multiple products with the same identifier, and 
 intrinsic disruptors randomly arranged and with random forms in two dimensions so as to be visible whatever an angle of picture shootings, wherein the intrinsic disruptors are colored fibers at bidimensional positions in a special paper or plastic, or the intrinsic disruptors are non-reproducible random shape of two-dimensional stains presented by solidified and dried specific chemical varnish, and 
 positioning markers which consist of a plurality of dots with geometric specific features for localizing an area, which includes the intrinsic disruptors, to be analyzed for authentication. 
 
 
     
     
       4. The authentication method as claimed in  claim 1 ,
 wherein the authentication device includes a security element, with or without an identifier, instead of a special paper or a randomly shaped varnish, the security element including a static or variable shape ink or paint, pigments of the ink or paint being fluorescent, with colors outside the four-color CMYK spectrum or outside the pantone spectrum, reflective, changing and/or resulting from a complex mixture of colors, the whole ensuring the perfection of the recognition of the ink or the paint. 
 
     
     
       5. An authentication device for implementing the authentication method as claimed in  claim 4 , the authentication device comprising
 a camera to take one or more pictures of the security element, with or without flash, and 
 a device configured to receive the one or more pictures and comprising a recognition algorithm software that visualizes the colors of the ink or paint and determines whether these colors correspond to the ink or paint of the original description, stored in a smartphone or in a cloud, wherein said software has either a direct connection to the cloud or to a blockchain, or a connection via a chatbot messaging service dedicated to the cloud or blockchain; 
 wherein the at least one security element is in the form of a tag or marking and simultaneously comprises:
 a unique identifier for a product or for a set of products or for identifying printing master on a plate of a static printer of any category that can print by rotation multiple products with the same identifier, 
 intrinsic disruptors randomly arranged and with random forms in two dimensions so as to be visible whatever an angle of picture shootings, wherein the intrinsic disruptors are colored fibers at bidimensional positions in a special paper or plastic, or the intrinsic disruptors are non-reproducible random shape of two-dimensional stains presented by solidified and dried specific chemical varnish, and 
 positioning markers which consist of a plurality of dots with geometric specific features for localizing an area, which includes the intrinsic disruptors, to be analyzed for authentication. 
 
 
     
     
       6. The authentication method as claimed in  claim 2 , wherein the at least one security element further includes a static or variable shape ink or paint, pigments of the ink or paint being fluorescent, with colors outside the four-color CMYK spectrum or outside the pantone spectrum, reflective, changing and/or resulting from a complex mixture of colors, the whole ensuring the perfection of the recognition of the ink or the paint. 
     
     
       7. The authentication method as claimed in  claim 1 , wherein the intrinsic disruptors include a position of colored fibers in a special paper. 
     
     
       8. The authentication device as claimed in  claim 3 , wherein the camera is a camera of a smartphone. 
     
     
       9. An authentication device for implementing the authentication method as claimed in  claim 2 , the authentication device comprising;
 a camera to take one or more pictures of the security element, with or without flash, and 
 a device configured to receive the one or more pictures and comprising a recognition algorithm software that visualizes a unique fingerprint of the varnish, allowing the authenticity of said at least one security element to be ascertained by comparing it almost instantaneously with the original description stored in a cloud, wherein said recognition algorithm software has either a direct connection to the cloud or a blockchain, or a connection via a chat box messaging service dedicated to the cloud or blockchain; 
 wherein the at least one security element is in the form of a tag or marking and simultaneously comprises:
 a unique identifier for a product or for a set of products or for identifying printing master on a plate of a static printer of any category that can print by rotation multiple products with the same identifier, 
 intrinsic disruptors randomly arranged and with random forms in two dimension so as to be visible whatever an angle of picture shootings, and 
 positioning markers which consist of a plurality of dots with geometric specific features for localizing an area, which includes the intrinsic disruptors, to be analyzed for authentication. 
 
 
     
     
       10. The authentication device as claimed in  claim 9 , wherein the camera is a camera of a smartphone. 
     
     
       11. The authentication device as claimed in  claim 5 , wherein the recognition algorithm software determines whether these colors correspond to the ink or paint of the original description using a neural network. 
     
     
       12. The authentication device as claimed in  claim 5 , wherein the camera is a camera of a smartphone.